Hook



FIG. 1 is a left side, top and front perspective view of a hook showing my new design;

FIG. 2 is a left side elevational view thereof, the view of the opposite side being a mirror image thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a top plan view thereof; and

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a hook, as shown and described. 